How many histogens are present in the root apex of dicots?

When roots or stems are $..........$, annular and spiral thickenings develop in the protoxylem vessels.

Given below are two statements:
Statement $I:$ Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement $II:$ Exarch condition is the most common feature of the root system.
In the light of the above statements,choose the correct answer from the options given below:

In dicot roots,the pericycle gives rise to ..........

Dicot roots are distinguished from monocot roots by the presence of:

In dicotyledonous angiosperms,the dermatogen originates from: